EP3028545B1 - Leuchtdiodenvorrichtung - Google Patents

Leuchtdiodenvorrichtung Download PDF

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Publication number
EP3028545B1
EP3028545B1 EP14750545.7A EP14750545A EP3028545B1 EP 3028545 B1 EP3028545 B1 EP 3028545B1 EP 14750545 A EP14750545 A EP 14750545A EP 3028545 B1 EP3028545 B1 EP 3028545B1
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Prior art keywords
light
emitting diode
led1
circuit
det1
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EP14750545.7A
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English (en)
French (fr)
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EP3028545A1 (de
Inventor
Christophe MAADED
Vincent Carreau
Abdelhak El Habibi
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Renault SAS
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Renault SAS
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/395—Linear regulators
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B44/00—Circuit arrangements for operating electroluminescent light sources
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/48—Details of LED load circuits with an active control inside an LED matrix having LEDs organised in strings and incorporating parallel shunting devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/58—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving end of life detection of LEDs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Definitions

  • the present invention generally relates to the field of light-emitting diode illumination.
  • a light-emitting diode device comprising, on the one hand, at least two branches mounted electrically in parallel and each comprising a light-emitting diode, a first branch comprising a first light-emitting diode and a second branch comprising a second light-emitting diode, and, on the other hand, a detection means adapted to detect a failure of said first light emitting diode.
  • the invention furthermore relates to a set of light-emitting diode devices as mentioned above, electrically connected in series with each other.
  • the present invention proposes a light-emitting diode device which, during the failure of a light-emitting diode, makes it possible to protect the other light-emitting diodes from accelerated aging or premature failure.
  • This light emitting diode device is designed to, when detecting a failure of the first light-emitting diode by the detection means, maintain a current flowing in the first branch.
  • the continuity of the operation of the light-emitting diode device is ensured even when the first light-emitting diode is faulty, since the second light-emitting diode remains powered by a current substantially equal to that before failure.
  • the second light-emitting diode continues to function normally and is preserved from aging or an increased risk of failure.
  • the invention finds a particularly advantageous application for the realization of a series-parallel array of light-emitting diodes.
  • the invention also proposes a set of diode devices electroluminescent devices comprising a plurality of light-emitting diode devices according to the invention, said light-emitting diode devices being electrically connected in series with each other.
  • Two elements mounted in shunt will, in turn, located in two branches connected in parallel, one or the other of these branches may also accommodate other electrical components, the voltages at the terminals of these two elements can then be different.
  • LED technology an acronym for "light-emitting diode” (also called “LED” for “ Light-Emitting Diode “ in English), is increasingly present in motor vehicles because it offers reduced power consumption and longer life compared to conventional lamps used so far, such as incandescent lamps or halogen lamps.
  • light-emitting diodes offer wide possibilities for shaping optical beams because light-emitting diodes are small light sources.
  • Light-emitting diode devices 10, 20 of Figures 1A and 3 are subject to stringent thermal and electrical conditions which are liable to damage the light-emitting diodes.
  • the failure of one or more light-emitting diodes can have serious consequences for the driver, for example during a night driving, since these failures lead to the loss of all or part of the luminous flux emitted by the light-emitting diode device.
  • the light-emitting diode device hereinafter referred to as "LED device” and referenced 10, comprises at least two branches 11, 12 which are electrically connected in parallel.
  • a power supply 13 connected between an input point 10A and an output point 10B of the LED device 10, provides the electrical energy necessary for the operation of the LED device 10.
  • this power supply 13 is a current regulator which maintains a predetermined supply voltage V across the LED device 10, i.e. between the input point 10A and the output point 10B. , and delivers a supply current of intensity I.
  • This supply current is independent of the supply voltage V and is fixed as a function of the different electrical components present in the first branch 11 and the second branch 12, and in a function of the level of luminous flux that the LED device 10 must emit.
  • the power supply could be a voltage regulator that drives the LED device in voltage.
  • Each branch 11, 12 here comprises a light emitting diode.
  • the different branches of the LED device could, for example, comprise several light-emitting diodes in series.
  • a first detecting means DET1 for detecting a failure of at least a first LED1 light emitting diode.
  • the current regulator REG1 will allow to consume substantially the same power that was consumed by the first light emitting diode LED1 before its failure. As for the switching circuit COM1, it will be possible to disconnect the first light-emitting diode LED1 and to connect instead of the latter the current regulator REG1.
  • the LED device 10 comprises only two branches 11, 12. This embodiment is mainly described and shown to illustrate in a simple manner the operation of the invention.
  • each branch 11, 12 here comprises a single light-emitting diode: the first branch 11 comprises a first LED1 placed on a first portion 11A of the first branch 11 and the second branch 12 comprises a second light-emitting diode LED2.
  • the first light-emitting diode LED1 and the second light-emitting diode LED2 may have identical or different optical characteristics (luminous flux, spectrum in wavelengths, color temperature, etc. ).
  • the first light-emitting diode LED1 and the second light-emitting diode LED2 may have identical or different electrical characteristics.
  • the first light-emitting diode LED1, the second light-emitting diode LED2, and the power supply 13 are connected in parallel.
  • the voltage V LED1 across the first light emitting diode LED1 and the second voltage V LED2 across the second light emitting diode LED2 are equal to the supply voltage V.
  • the electrical characteristics of the LEDs LED1, LED2 being slightly different here, the first direct current F1 passing through the first LED1 and the second direct current F2 through the second LED2 can be different.
  • a light-emitting diode may exhibit a failure thereby causing its extinction or breakdown.
  • the first light-emitting diode LED1 can thus have, for example, an open circuit failure.
  • the passage of the current in the first portion 11A of the first branch 11 is interrupted and the voltage V LED1 across the first LED1 increases temporarily.
  • the risk is then that the entire supply current I passes in the second branch 12, which would cause the increase in the current flowing through the second LED2 LED and could cause degradation thereof.
  • the first light-emitting diode LED1 may, on the contrary, have a short-circuit failure. In this case, the passage of the current in the first portion 11 A of the first branch 11 is without resistance and the second light emitting diode LED2 is short-circuited and no longer emits light. Thus, the LED device 10 is rendered inoperative.
  • any failure of the first light emitting diode LED1 results in a variation of the voltage V LED1 at its terminals.
  • the LED device 10 allows, when the first light emitting diode LED1 has a failure, to maintain the intensity of the second current I2 through the second branch 12 to a value close to its value before the failure of the first LED1 light emitting diode.
  • the first detecting means DET1 is mounted across the first LED1 to display the value of the voltage V LED1 across the first LED1.
  • the first detecting means DET1 further comprises (see FIG. figure 2 ) a system for identifying an open circuit state COMP OC, 1 and a system for identifying a short-circuited state COMP SC, 1 of the first light-emitting diode LED1.
  • the system for identifying an open-circuit state COMP OC, 1 here comprises a voltage comparator which compares the measured value of the voltage V LED1 across the first LED1 to an open-circuit reference voltage V OC , REF .
  • the open-circuit reference voltage V OC, REF will be chosen greater than V f1 and between 4.5V and 5, 5V.
  • the system for identifying a short-circuited state COMP SC, 1 comprises here also a voltage comparator which compares the measured value of the voltage V LED1 across the first light emitting diode LED1 to a short-circuit reference voltage V SC, REF .
  • This short-circuit reference voltage V SC, REF is between 0V and the threshold voltage of the first light-emitting diode LED1.
  • the short-circuit reference voltage V SC, REF will be between 1 V and 2V.
  • the first detection means of the LED device could comprise either only an open circuit state identification system, or only a short circuit state identification system.
  • the first detection means DET1 also comprises a LOG1 logic circuit with two inputs and an output.
  • the first detection means could for example comprise an analog circuit.
  • This logic circuit LOG1 accepts as input the open-circuit reference voltage V OC, REF and the short-circuit reference voltage V SC, REF and outputs a detection voltage V DET1 .
  • This logic circuit LOG1 may for example be an "AND" gate.
  • the first detecting means DET1 can detect a possible failure of the first light emitting diode LED1, in short circuit or in open circuit.
  • the current regulator REG1 is electrically mounted in shunt of the first light-emitting diode LED1, on a second portion 11B of the first branch 11.
  • This current regulator REG1 is controlled by the detection voltage V DET1 delivered by the first detecting means DET1.
  • the current regulator REG1 is activated by the detection means DET1 and has two different electrical states depending on the value of the detection voltage V DET1 .
  • the current regulator REG1 when the detection voltage V DET1 is greater than a certain predetermined threshold, a sign that the first light-emitting diode LED1 is operating correctly, the current regulator REG1 is inactive and is electrically equivalent to an open circuit in which no current flows.
  • the current regulator REG1 is active and delivers a current in the first branch 11.
  • This current regulator REG1 may for example comprise a bipolar transistor connected in series with a calibration resistor, the base of the transistor, connected to the detecting means DET1, being subjected to the detection voltage V DET1 and the emitter and the collector of the transistor being connected to the second portion 11 B of the first branch 11.
  • the current regulator may for example comprise a bipolar transistor and a calibration resistor connected in parallel with the junction between the base and the emitter of the transistor.
  • the switching circuit COM1 is placed at the junction between the first portion 11A and the second portion 11B of the first branch 11, respectively after the first LED1 and after the current regulator REG1.
  • the switching circuit may for example be before the first light-emitting diode and before the current regulator.
  • the switching circuit COM1 is controlled by the detection means DET1 and is in the second state, respectively the first state, depending on whether the detecting means DET1 detects or not a failure of the first LED1.
  • the LED device 10 of the figure 1 A is electrically equivalent to the circuit diagram shown on the figure 1C .
  • the current regulator REG1 is chosen so that when it is connected in the first branch 11 by the switching circuit COM1 controlled by the detection means DET1, it delivers a current substantially equal to the current which crossed the first light-emitting diode LED1 before its failure.
  • the second current I2 flowing in the second branch 12, and passing through the second light-emitting diode LED2 which does not exhibit a fault remains substantially constant, close to its value before the failure of the first LED1 light emitting diode.
  • the balancing resistor R eq, 1 can also make it possible to set a predetermined value of the current flowing through the current regulator REG1.
  • the LED device 20 also comprises a second detecting means DET2 which, like the first detecting means DET1, detects a failure of the second LED2.
  • the LED device 20 comprises compensation resistors R comp, 1 , R comp, 2 placed respectively in the first and the second branch 11, 12 (see FIG. figure 4 ), after the first switching circuit COM1 and after the second switching circuit COM2, for adjusting the voltages in the first branch 11 and the second branch 12, with or without failure of one of the LEDs LED1, LED2.
  • the LED device may also include series-mounted balancing resistors of the first and second branch current regulators.
  • This assembly 30 is formed of a so-called “series-parallel" arrangement of two LED devices each comprising four light-emitting diodes LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 (hereinafter referred to as LED1-LED8) mounted in parallel with each other, the two LED devices being electrically connected in series with each other.
  • Such an assembly 30 of LED devices is also called “matrix 4 x 2 LEDs.”
  • the set of LED devices may include a plurality of LED devices each comprising a different number of light emitting diodes connected in parallel with each other.
  • each LED1 - LED8 light emitting diode is coupled with (see FIG. figure 4 ) detecting means DET1, DET2, DET3, DET4, DET5, DET6, DET7, DET8, a current regulator REG1, REG2, REG3, REG4, REG5, REG6, REG7, REG8, and a switching circuit COM1, COM2, COM3, COM4, COM5, COM6, COM7, COM8 operating together in the same manner as previously described.
  • the currents flowing through the non-faulty light-emitting diodes remain substantially equal before and after diode failure. electroluminescent, which does not affect their service life.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Led Devices (AREA)
  • General Engineering & Computer Science (AREA)

Claims (10)

  1. Leuchtdiodenvorrichtung (10, 20), die Folgendes umfasst:
    - wenigstens zwei Zweige (11, 12), die zueinander elektrisch parallel geschaltet sind und jeweils eine Leuchtdiode (LED1, LED2) enthalten, wovon ein erster Zweig (11) eine erste Leuchtdiode (LED1) enthält und ein zweiter Zweig (12) eine zweite Leuchtdiode (LED2) enthält, und
    - erste Detektionsmittel (DET1), die dafür ausgelegt sind, einen Ausfall der ersten Leuchtdiode (LED1) zu detektieren,
    - einen Stromregulierer (REG1), der mit der ersten Leuchtdiode (LED1) im Nebenschluss geschaltet ist, dadurch gekennzeichnet, dass sie außerdem Folgendes umfasst:
    - eine Kommutationsschaltung (COM1), die durch das Detektionsmittel (DET1) gesteuert wird, um abwechselnd den Strom, der durch die erste Leuchtdiode (LED1) oder durch den Stromregulierer (REG1) fließt, zu sperren, je nachdem, ob die Detektionsmittel (DET1) einen Ausfall der ersten Leuchtdiode (LED1) detektieren oder nicht.
  2. Leuchtdiodenvorrichtung (10, 20) nach Anspruch 1, wobei der Stromregulierer (REG1) ein Stromgenerator ist, der durch die Detektionsmittel (DET1) gesteuert wird.
  3. Leuchtdiodenvorrichtung (10, 20) nach einem der Ansprüche 1 und 2, wobei die Detektionsmittel (DET1) ein System zum Identifizieren eines Zustands (COMPOC,1) mit offenem Kreis der ersten Leuchtdiode (LED1) umfassen.
  4. Leuchtdiodenvorrichtung (10, 20) nach Anspruch 3, wobei die Detektionsschaltung (DET1) an die Kommutationsschaltung (COM1) eine Detektionsspannung (VDET1) liefert, deren Wert eine Funktion des Ergebnisses eines Vergleichs zwischen dem gemessenen Wert der Spannung (VLED1) an den Anschlüssen der ersten Leuchtdiode (LED1) und einer Referenzspannung (VOC,REF) bei offenem Kreis ist.
  5. Leuchtdiodenvorrichtung (10, 20) nach einem der Ansprüche 1 bis 4, wobei die Detektionsmittel (DET1) ein System zum Identifizieren eines Zustands (COMPSC,1) bei offenem Kreis der ersten Leuchtdiode (LED1) umfassen.
  6. Leuchtdiodenvorrichtung (10, 20) nach Anspruch 5, wobei die Detektionsschaltung (DET1) an die Kommutationsschaltung (COM1) eine Detektionsspannung (VDET1) liefert, deren Wert eine Funktion des Ergebnisses eines Vergleichs zwischen einem gemessenen Wert der Spannung (VLED1) an den Anschlüssen der ersten Leuchtdiode (LED1) und einer Referenzspannung (VSC,REF) bei offenem Kreis ist.
  7. Leuchtdiodenvorrichtung (10) nach einem der Ansprüche 1 bis 6, wobei der erste Zweig (11) einen Gleichgewichtswiderstand (Req,1) enthält, der mit dem Stromregulierer (REG1) elektrisch in Reihe geschaltet ist.
  8. Leuchtdiodenvorrichtung (20) nach einem der Ansprüche 1 bis 7, wobei der erste Zweig (11) einen Kompensationswiderstand (Rcomp,1) umfasst, der mit einer sekundären Schaltung, die den Stromregulierer (REG1) und die erste Leuchtdiode (LED1) enthält, elektrisch in Reihe geschaltet ist.
  9. Leuchtdiodenvorrichtung (20) nach einem der Ansprüche 1 bis 8, die außerdem Folgendes umfasst:
    - weitere Detektionsmittel (DET2), die dafür ausgelegt sind, einen Ausfall der zweiten Leuchtdiode (LED2) zu detektieren,
    - einen weiteren Stromregulierer (REG2), der zu der zweiten Leuchtdiode (LED2) parallel geschaltet ist, und
    - eine weitere Kommutationsschaltung (COM2), die durch die weiteren Detektionsmittel (DET2) gesteuert wird, um abwechselnd den Strom, der durch die zweite Leuchtdiode (LED2) oder durch den weiteren Stromregulierer (REG2) fließt, zu blockieren, je nachdem, ob die weiteren Detektionsmittel (DET2) einen Ausfall der zweiten Leuchtdiode (LED2) detektieren oder nicht.
  10. Anordnung (30) von Leuchtdiodenvorrichtungen, dadurch gekennzeichnet, dass sie mehrere Leuchtdiodenvorrichtungen nach einem der Ansprüche 1 bis 9, die miteinander elektrisch in Reihe geschaltet ist, umfasst.
EP14750545.7A 2013-08-02 2014-06-25 Leuchtdiodenvorrichtung Active EP3028545B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1357696A FR3009474B1 (fr) 2013-08-02 2013-08-02 Dispositif a diodes electroluminescentes
PCT/FR2014/051585 WO2015015071A1 (fr) 2013-08-02 2014-06-25 Dispositif a diodes electroluminescentes

Publications (2)

Publication Number Publication Date
EP3028545A1 EP3028545A1 (de) 2016-06-08
EP3028545B1 true EP3028545B1 (de) 2017-05-03

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EP (1) EP3028545B1 (de)
JP (1) JP6461955B2 (de)
KR (1) KR102088437B1 (de)
CN (1) CN105493630B (de)
ES (1) ES2626587T3 (de)
FR (1) FR3009474B1 (de)
RU (1) RU2658297C2 (de)
WO (1) WO2015015071A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020034140A1 (en) * 2018-08-16 2020-02-20 Boe Technology Group Co., Ltd. A method for driving a pixel circuit with feedback compensation, a circuit for driving a light-emitting device, and a display apparatus

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3046247B1 (fr) * 2015-12-28 2018-06-15 Commissariat A L'energie Atomique Et Aux Energies Alternatives Circuit integre pour detection d’un defaut d’isolation avec une armature conductrice
US9820343B1 (en) * 2016-07-25 2017-11-14 Infineon Technologies Ag Light-emitting diode headlight driver
KR20160134608A (ko) 2016-11-03 2016-11-23 여지홍 전기자동차에서 사각지역(사각지대)를 해소할 수 있는 핸드폰 카메라용 렌즈, 모니터와 센서점멸등으로 구성된 기록장치
CN108093506B (zh) * 2016-11-23 2024-04-19 常州星宇车灯股份有限公司 一种日行灯和位置灯复用的led驱动电路
CN106604458B (zh) * 2016-12-07 2018-03-09 武汉精立电子技术有限公司 可检测led灯串开短路的恒流源驱动装置及方法
CN107846747A (zh) * 2017-11-01 2018-03-27 合肥艾斯克光电科技有限责任公司 Led智能灯具系统
KR102670976B1 (ko) * 2021-07-27 2024-05-29 주식회사 알파홀딩스 엘이디 구동 장치 및 이를 이용한 엘이디 개방 및 단락 검사 방법

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3105302U (ja) * 2004-05-18 2004-10-28 チクシ電気株式会社 定電流化ｌｅｄ基板
JP5239138B2 (ja) * 2005-08-31 2013-07-17 東芝ライテック株式会社 Ｌｅｄ点灯装置
EP1777533A1 (de) * 2005-10-21 2007-04-25 ALCATEL Transport Solution Deutschland GmbH Überwachungseinrichtung für ein Array von elektrische Bauteilen
US7710050B2 (en) * 2005-11-17 2010-05-04 Magna International Inc Series connected power supply for semiconductor-based vehicle lighting systems
TWI307970B (en) * 2005-12-13 2009-03-21 Macroblock Inc Light-emitting semiconductor device with open-bypass function
CN2901774Y (zh) * 2006-03-27 2007-05-16 久铁工业股份有限公司 发光二极管灯具的安全控制装置
JP2009545115A (ja) * 2006-07-26 2009-12-17 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 機能不全時に電気素子を非活性化する装置及び方法
EP1965609A3 (de) * 2007-02-27 2011-06-15 Lumination, LLC Erkennung von Kettendefekten mittels LED
JP2008288179A (ja) * 2007-05-16 2008-11-27 Denshi System Design Kk 発光ダイオードの点灯制御方法及び制御回路
JP5265937B2 (ja) * 2008-01-30 2013-08-14 パナソニック株式会社 発光装置
RU84130U1 (ru) * 2008-06-27 2009-06-27 Руслан Сергеевич Зайцев Устройство контроллер для управления сверхяркими светодиодами в активных светофорных головках
DE102008031029B4 (de) * 2008-06-30 2012-10-31 Texas Instruments Deutschland Gmbh Elektronisches Bauelement mit einer Schutzschaltung für eine lichtemittierende Vorrichtung
US8860427B2 (en) * 2009-04-20 2014-10-14 Infineon Technologies Ag Failure detection for series of electrical loads
JP5163590B2 (ja) * 2009-04-23 2013-03-13 東芝ライテック株式会社 Ｌｅｄ点灯装置及び標識灯システム
TWI419609B (zh) * 2009-08-19 2013-12-11 Novatek Microelectronics Corp 具有同時偵測開路及短路功能之發光二極體裝置及其方法
KR20110101938A (ko) * 2010-03-10 2011-09-16 삼성엘이디 주식회사 Ｌｅｄ 구동 회로
KR20110104819A (ko) * 2010-03-17 2011-09-23 서울반도체 주식회사 발광 다이오드 어레이 회로
JP5901966B2 (ja) * 2011-01-13 2016-04-13 ローム株式会社 Ｌｅｄショート検出回路、ｌｅｄ駆動装置、ｌｅｄ照明装置、車両
TWM418292U (en) * 2011-05-18 2011-12-11 Richtek Technology Corp Light emitting device open/short detection circuit
JP5510503B2 (ja) * 2012-08-01 2014-06-04 カシオ計算機株式会社 半導体装置、半導体光源装置、半導体装置の制御方法及び投影装置
CN102802307A (zh) * 2012-08-02 2012-11-28 常州星宇车灯股份有限公司 智能led车灯拓扑保护系统
CN102917508B (zh) * 2012-10-31 2014-12-10 上海小糸车灯有限公司 一种具有保护功能的多路恒流led驱动电路及其线路板结构

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020034140A1 (en) * 2018-08-16 2020-02-20 Boe Technology Group Co., Ltd. A method for driving a pixel circuit with feedback compensation, a circuit for driving a light-emitting device, and a display apparatus
US11295666B2 (en) 2018-08-16 2022-04-05 Hefei Boe Optoelectronics Technology Co., Ltd. Method for driving a pixel circuit with feedback compensation, a circuit for driving a light-emitting device, and a display apparatus

Also Published As

Publication number Publication date
KR102088437B1 (ko) 2020-03-12
FR3009474B1 (fr) 2015-07-31
WO2015015071A1 (fr) 2015-02-05
FR3009474A1 (fr) 2015-02-06
RU2016107489A3 (de) 2018-04-02
RU2016107489A (ru) 2017-09-06
JP2016530714A (ja) 2016-09-29
EP3028545A1 (de) 2016-06-08
KR20160038032A (ko) 2016-04-06
JP6461955B2 (ja) 2019-01-30
CN105493630A (zh) 2016-04-13
CN105493630B (zh) 2017-08-25
ES2626587T3 (es) 2017-07-25
RU2658297C2 (ru) 2018-06-20

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